12821

Information

• Patent Grant
• 12821

• References
• Source

• Patent Number

  12,821

• Date Filed

  Not available

• Date Issued

  Tuesday, May 8, 1855
  169 years ago

• CPC

  • E01B29/11 - Removal involving destruction of the sleeper
  • Y10T83/6985 - Of arcuately oscillating tool

• US Classifications

  • 083 - Cutting